Session VWAP Reaction Engine [AGPro Series]Session VWAP Reaction Engine
Session VWAP Reaction Engine builds the active intraday session VWAP as a reaction anchor and classifies confirmed price behaviour around it into three clear event types — Reclaim, Bounce, and Reject — each validated by a configurable confirmation window, a minimum prior-side bar filter, and an optional VWAP slope alignment filter. A volatility-scaled reaction corridor, compact reaction zones, a session box, and a minimal right-side bias panel turn raw session flow into a clean, publication-ready read on acceptance, rejection, and continuation.
🔷 OVERVIEW
Most session VWAP tools simply plot the line. Session VWAP Reaction Engine goes further: it reads how price behaves around the line inside a selected session window (Asia, London, New York, or Custom) and labels that behaviour using three structural event classes:
• Reclaim — a confirmed cross and acceptance on the new side of session VWAP, after price has spent a minimum number of bars on the opposite side.
• Bounce — a test of the reaction corridor edge that closes back on the prevailing side, with body-range and slope alignment quality checks feeding a Strong / Clean / Weak strength read.
• Reject — a wick into session VWAP that fails to accept on the other side, resolving as pressure against the crossing attempt.
Each confirmed event paints a compact rectangular reaction zone, a single label near the zone, and updates a right-side bias panel so the current session's story is always readable at a glance.
🟦 WHAT MAKES IT DIFFERENT
▸ Event classification, not just a line. Reclaim, Bounce, and Reject are treated as distinct structural events — each with its own confirmation path and visual signature — instead of blending into a single "crossed VWAP" signal.
▸ Corridor-based reaction detection. Bounce and Reject use a volatility-scaled ATR corridor around session VWAP rather than a single-pixel touch, which matches how VWAP is typically tested in real intraday flow.
▸ Slope-aware trend filter. Optional VWAP slope alignment biases bounce events toward the prevailing session direction and filters out counter-flow reactions that tend to fail.
▸ Reaction Strength read. Bounces are classified Strong / Clean / Weak using body-to-range ratio, close location in range, and slope alignment — turning every bounce into a quality-graded event.
▸ Active-Only and Publish Focus visual modes. The chart stays clean by surfacing only the latest session and the latest confirmed reaction, with older structure fading or removed. Ideal for decision-making and presentation.
🟣 METHODOLOGY
1) Session anchor. The selected session (Asia / London / New York / Custom) resets a cumulative PV / V VWAP on every new session bar, giving a fresh reaction reference for that window.
2) Prior-side filter. Before any Reclaim or opposite-side reaction can qualify, price must have spent a minimum configurable number of bars on one side of session VWAP. This isolates structural interactions and rejects chop.
3) Reclaim confirmation. A raw cross must be followed by N consecutive confirmed closes on the new side (default 2) before the Reclaim is validated and painted.
4) Corridor reactions. A volatility-scaled corridor (ATR × user multiplier) around session VWAP defines where Bounce and Reject qualify. Bounces require a corridor-edge test plus a close back on the prevailing side with body confirmation; Rejects require a wick into session VWAP that closes on the originating side.
5) Bias and state synthesis. Live Bias (Bullish / Bearish Acceptance or Pressure, or Neutral Rotation) is derived from close position relative to VWAP and corridor. Reaction State reflects the latest confirmed event (Bullish Acceptance, Bearish Acceptance, Bounce Support, Bounce Resistance, Reject Pressure, Reject Lift).
6) Post-session context. After the session ends, the last session VWAP and corridor stay on the chart for a configurable number of bars so recent structure remains visible without polluting older history.
🟢 SIGNALS & ALERTS
Eight alertcondition hooks are provided, all bar-close confirmable:
• Bullish Session VWAP Reclaim Confirmed
• Bearish Session VWAP Reclaim Confirmed
• Bullish Session VWAP Bounce Confirmed
• Bearish Session VWAP Bounce Confirmed
• Bullish Session VWAP Reject Confirmed
• Bearish Session VWAP Reject Confirmed
• Reaction State Shifted Bullish
• Reaction State Shifted Bearish
A "Confirmed Alerts Only" toggle restricts firing to barstate.isconfirmed so alerts will not repaint before close.
🟡 KEY INPUTS
Session Engine
• Selected Session — Asia / London / New York / Custom
• Custom Session — HHmm-HHmm format (used when Custom is selected)
• Session Timezone — Exchange / UTC / London / New York / Singapore
Reaction Engine
• Reclaim Confirm Bars — number of confirmed closes required after a cross (default 2)
• Minimum Prior Side Bars — whipsaw filter on the opposite side before qualifying (default 2)
• Reaction Corridor Width (ATR) — half-width of the ATR corridor around VWAP (default 0.20)
• Reaction Zone Length (Bars) — how far a confirmed zone extends right (default 14)
• Use VWAP Slope Alignment — trend filter for bounce events (default on)
• VWAP Slope Lookback — slope estimation window (default 3)
• Post-Session Context Bars — how long last session structure stays visible (default 18)
Visual Story
• Active-Only Mode, Publish Focus Mode, Show Previous Reaction Ghost
• Show Session Box, Show VWAP Reaction Corridor, Show Confirmed Reaction Zone
• Show Reaction Label, Show Session VWAP, Show Right-Edge SVWAP Tag
• Visible History Bars (default 700), Label Font Size (default Normal)
Panel
• Show Bias Panel (top-right), Panel Font Size (default Normal)
Alerts
• Confirmed Alerts Only (default on)
🟠 HOW TO USE
1) Apply to any intraday timeframe (1m–4h). Session VWAP requires intraday data to anchor the session reference.
2) Choose the session that best fits your market focus — New York for US equities and US-hours crypto, London for FX and European hours, Asia for Asian-session flow, or a Custom window.
3) Watch the corridor as the session develops. Bounce and Reject events inside the corridor describe how the session is defending or failing the VWAP reference.
4) Use Reclaim events as session-context shifts — combine with your own structure (HTF trend, S/R, order flow) rather than treating them as standalone entries.
5) Read the right-side Bias Panel for a compact summary: Session Status, Bias, Last Reaction, Reaction Strength, Signal Age, Reaction State, and Latest Line status.
6) For screenshots and presentation use, keep Publish Focus Mode and Active-Only Mode enabled — older sessions fade and only the latest structure remains dominant.
🟤 LIMITATIONS & TRANSPARENCY
• Intraday-only. Session VWAP is meaningful only on intraday timeframes; on daily and higher, the indicator will remain idle.
• Session VWAP resets at the start of each selected session. Reactions are evaluated within that window only.
• Confirmed events use bar-close logic. Intra-bar touches of the corridor are not counted as events until the bar closes.
• Volume-dependent. Session VWAP uses symbol volume. On symbols without meaningful volume, VWAP accuracy will be limited.
• The Reaction Corridor is a volatility-scaled visual and detection band, not a support/resistance guarantee.
⚠️ RISK DISCLOSURE
This indicator is an analytical and visualisation tool. It is not a trading strategy, does not generate buy/sell recommendations, does not predict future price direction, and does not guarantee any specific outcome. All signals, zones, and panel readings describe past and current price behaviour around session VWAP, not forecasts.
Markets carry risk of loss. Always use independent risk management, position sizing, and your own trading plan. Past behaviour of any signal does not imply future performance.
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